Levi Johnston: I'm Not Ashamed of Posing Nude

"I wouldn't go back and change anything," he said

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Levi Johnston said he has no regrets about his decision to be a soon-to-be celebrity centerfold.

In a two-part interview with CBS's "The Early Show" that aired Thursday, the 19-year-old moose-hunting hockey hunk said he isn't ashamed of his upcoming full-frontal photo shoot for nudie mag Playgirl and said he has no regrets about being in the national spotlight.

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"I wouldn't go back and change anything," he said, "but I do wish that Bristol [Palin] and I could have a relationship and raise the baby."

The teen dad and almost-son-in-law of Sarah Palin said though he realizes his sexy shoot may project "not a good image" to the public, he vows that it will be done "tastefully" and isn't concerned about what the Palin clan has to say about his decision to pose for the spread.

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"She's doing her thing. I'm doing mine," he said of the former Alaskan governor.

Levi, who confessed there are some things he wouldn't do for money, also said he doesn't see Palin's future in politics.

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"I think that run is over after she quit that governor job," Johnston said.

For now, Levi has been prepping for his revealing spread.

"I just get naked," Levi told Usmagazine.com earlier this week. "That's what I do."

Sarah Palin ripped into the teen father of her 10-month-old grandson after he claimed in part one of the interview that aired Wednesday he had dirt on Palin that could get the former veep wannabe "in trouble and could hurt her."

"Consider the source of the most recent attention-getting lie," Palin said in a statement. "Those who would sell their body for money reflect a desperate need for attention and are likely to say and do anything for even more attention."

The father of Sarah Palin's grandson has been beefing up for the risque shoot by working out six days a week and eating a diet high in protein.

"He's pumped!" manager Tank Jones told Usmagazine.com. "He's ready to shock the world. The hell with 15 minutes. As a matter of fact, when I picked him up , he came out of the house naked. I said, 'Not now!'"